Problem with connecting older BJ5000ex machines to RC4

Created by Patrik Neuendorf, Modified on Wed, 6 Dec, 2023 at 11:48 AM by Patrik Neuendorf

The communication in BJ5000ex is RS485 and machines are equipped with end terminating resistors. But the values of the resistor (should be 1200 Ohm) in older machines and older RC4 the resistor is only at 120 Ohm which loads the communication wires a bit too much.

The solution is to open up the Ex machine case and remove the short circuit connector that is next to the 32 pole connector. 

In RC4 the same jumper is found when open up the case lid next to the green power connector socket. Remove the jumper.

The communication should then work.

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